Filter



FIG. 1 is a front, top, and right side perspective view of a filter showing the new design.

FIG. 2 is a rear, bottom, and left side perspective view thereof.

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image of the front elevational view.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The evenly spaced broken lines depict portions of the filter that form no part of the claimed design. The filter is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for a filter, as shown and described. 